Higher demand for heating and record LNG exports left U.S. natural gas in storage at the end of the winter at its lowest level in three years, after larger-than-normal storage withdrawals this past winter, the Energy Information Administration (EIA) said on Friday. Because of the higher withdrawals, by the end of March, the U.S. had the least amount of natural gas in underground storage in the Lower 48 states since 2019. Working natural gas in underground storage facilities in the Lower 48 states totaled 1,387 billion cubic feet (Bcf) as of the…